# Relationship history for MSHA mine 3101154

Current hierarchy: **George C  Turner → Ready Mixed Concrete → WHITE PIT I**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** White Concrete Company Inc → WHITE PIT I; 1950-01-01 to 1985-05-31; source msha-controller-operator-history
- **controller_controls_mine:** A J  White Jr → WHITE PIT I; 1950-01-01 to 1985-05-31; source msha-controller-operator-history
- **controller_controls_operator:** A J  White Jr → White Concrete Company Inc; 1950-01-01 to 1985-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Ready Mixed Concrete → WHITE PIT I; 1985-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** George C  Turner Et Al → WHITE PIT I; 1985-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** George C  Turner Et Al → Ready Mixed Concrete; 1985-06-01 to current/open; source msha-controller-operator-history